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A Queensland University of Technology law lecturer facing serious child porn charges has refused to let police access his laptop computer, a court has heard.

Gordon Douglas Chalmers has been charged with using a carriage service to groom and procure children under 16, possessing child exploitation material and using a carriage service to access child porn.

He's been accused of pretending to be pop star Justin Bieber to procure underage children from overseas, Brisbane Magistrates Court heard on Saturday.

German and US authorities tipped off Queensland police who raided the 41-year-old's Kenmore home on Friday.

The search warrant required Chalmers to provide access to his social media and messaging accounts and cloud servers but he "refused", police prosecutor Sergeant Henri Rantala told the court.

Chalmers' barrister Gerry Elmore told Magistrate Elizabeth Hall his client did not provide access because, as a law lecturer, he had privileged material obtained from barristers in the course of his profession on his hard drive.

Sgt Rantala told the court Chalmers used Facebook and Skype to communicate with children and police found the Skype account had about 6000 contacts, "the majority" children.